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Fix for segfault in __ast_rwlock_destroy with DEBUG_THREADS

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If DEBUG_THREADS is enabled __ast_rwlock_destroy causes a segfault while trying
to access a possible NULL t->track object.  A NULL check has been added before
trying to access the memory.

(closes issue ASTERISK-21724)
Reported by: Corey Farrell
Fixed by: Corey Farrell
Patches:
	ast_rwlock_destroy-segv.patch uploaded by Corey Farrell (license 5909)
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Merged revisions 388838 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 388839 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@388840 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin Harwell
2013-05-15 15:58:56 +00:00
parent d8d1def22c
commit 2eebab3992
1 changed files with 1 additions and 1 deletions
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2
main/lock.c
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@@ -745,7 +745,7 @@ int __ast_rwlock_destroy(const char *filename, int lineno, const char *func, con
__ast_mutex_logger("%s line %d (%s): Error destroying rwlock %s: %s\n", __ast_mutex_logger("%s line %d (%s): Error destroying rwlock %s: %s\n",
filename, lineno, func, rwlock_name, strerror(res)); filename, lineno, func, rwlock_name, strerror(res));
} }
if (t->tracking) { if (t->tracking && lt) {
ast_reentrancy_lock(lt); ast_reentrancy_lock(lt);
lt->file[0] = filename; lt->file[0] = filename;
lt->lineno[0] = lineno; lt->lineno[0] = lineno;